Assigning (Adding) Cells to an nPartition

You can add cells to an nPartition by using any one of the following procedures:

Adding cells to an nPartition involves selecting available cells (those not currently assigned to an nPartition) and assigning them to an existing nPartition. Both the selected cells and any I/O chassis connected to the cells are assigned to the designated nPartition.




	NOTE: Adding or removing cells from an nPartition will change the amount of memory available to the nPartition, possibly significantly. You should consider how the memory change may affect the amount of swap space necessary for the nPartition and if needed adjust the swap space size.

You can add cells to the local nPartition or to any remote nPartitions in the same server complex.

Reboot for Reconfig Guidelines for Adding Cells. In some situations, you must immediately perform a reboot for reconfig of a modified nPartition after adding cells to it.

You must perform a reboot for reconfig of an active nPartition after you have added a cell to it (HP-UX: shutdown -R; Windows: shutdown /r; Linux: shutdown -r time; OpenVMS: @SYS$SYSTEM:SHUTDOWN with an automatic system reboot). The reboot for reconfig enables the newly assigned cell to rendezvous and be actively used when the nPartition reboots.
Perform a reboot for reconfig of an nPartition as soon as possible after you have added a cell to an active nPartition and have specified a "y" use-on-next-boot value for the new cell.
You need not perform a reboot for reconfig of an nPartition in these situations:
- When you have added a cell to an inactive nPartition.
- When you have added a cell with a "n" use-on-next-boot value and you did not specify the -B option to the parmodify command.

Procedure 6-6 Adding Cells to an nPartition (nPartition Commands)

From the command line, use the parmodify command to add cells to an nPartition. You also can use the parstatus command to list nPartition and complex details, such as available cells.




	NOTE: You can remotely perform this task using remote administration options supported by the Enhanced nPartition Commands or Partition Manager Version 2.0. Remote administration is supported by the Partition Manager ToolsSwitch Complexes action and by the nPartition command `-u... -h...` options or `-g... -h...` options. For details see “Tools for Configuring nPartitions”.

Use the parstatus -A -C command to list all available cells (the unassigned cells) in the server complex.
Choose one or more eligible cells from the list to add to the nPartition.
Adding the cell(s) to the nPartition must create a configuration that meets the hardware requirements and performance guidelines.
Modify the nPartition by issuing the parmodify -p# -a#... command to add the cell (-a#... where # is the cell number) to the specified nPartition (-p# where # is the nPartition number). The -a... option differs slightly for the nPartition command releases.
To add multiple cells, you can specify the -a option multiple times in the same command.
parmodify Command: -a Option Differences for nPartition Command Releases. The parmodify command's -a... option specifies a cell number and attributes, which are used when adding the cell to an existing nPartition. For the Enhanced nPartition Commands, an additional cell local memory attribute is optional. Both syntaxes are given in the following list.
- For the Original nPartition Commands, the parmodify command's -a... option is as follows:
  -a cell:[type]:[use]:[fail]
  where:
  cell
  The cell to be added to the nPartition. You can specify the cell in global (cell) format or in hardware location (cabinet/slot) format.
  type
  The cell type: base is the only supported cell type and it is the default.
  use
  The cell use-on-next-boot value: y or n. Use y (the default) if the cell is to be an active member of the nPartition, or use n if the cell is to remain an inactive member.
  fail
  The cell failure usage: ri (reactivate with interleave) is the only supported failure usage policy and it is the default.
  For details, refer to the parmodify(1M) manpage.
- For the Enhanced nPartition Commands, the parmodify command's -a... option is as follows:
  -a cell:[type]:[use]:[fail][:clm]
  where the cell, type, use, and fail attributes are the same as supported by the Original nPartition Commands.
  The clm value specifies the amount of memory that will be configured as cell local memory for the cell.
  You can specify the clm value in either of two forms: percentage or absolute amount of memory.
  Percentage cell-local memory (CLM).
  The percent number can be any number in the range 0-100 with a suffix of %.
  This number is rounded to 12.5%, 25%, 37.5%, 50%, 62.5%, 75%, 87.5% or 100%. If the cell contains less than 4 GBytes of memory, then the percentage is rounded to 25%, 50%, 75% or 100%. Percentages are rounded up or down to the nearest value, but are not rounded up to 100%.
  Absolute CLM specification. (The default.)
  The absolute number is interpreted as an absolute number of gigabytes of memory and can optionally have a suffix of GB.
  As needed, an absolute CLM specification is rounded up to the nearest 0.5 GBytes.
  If the clm value is rounded, the command reports the final value used. For details, refer to the parmodify(1M) manpage.
parmodify Command: -B Option for nPartition Booting. You can optionally specify the parmodify command's -B option to require that the modified nPartition be rebooted.
- When you specify -B to modify an inactive nPartition, the changes to the inactive nPartition are completed immediately and the nPartition then boots and becomes active.
- When you specify -B to modify an active nPartition, you must perform a reboot for reconfig for the changes to be completed. After the reboot for reconfig occurs the nPartition boots and becomes active (because the parmodify command -B option was specified).
Refer to the parmodify(1M) manpage for details on all options.
As needed, perform a reboot for reconfig on the modified nPartition (HP-UX: shutdown -R; Windows: shutdown /r; Linux: shutdown -r time; OpenVMS: @SYS$SYSTEM:SHUTDOWN with an automatic system reboot).
See “Reboot for Reconfig Guidelines for Adding Cells” for details on when to perform a reboot for reconfig.

Procedure 6-7 Adding Cells to an nPartition (Partition Manager)

You can add cells to an nPartition by using Partition Manager.

When using Partition Manager Version 1.0, select an nPartition, and use the PartitionModify Partition action, Add/Remove Cells tab.

When using Partition Manager Version 2.0, select an nPartition, and use the nPartitionModify nPartition action, Add/Remove Cells tab.

Access Partition Manager.
For details on accessing Partition Manager or other tools, see “Tools for Configuring nPartitions”.
Select the nPartition to which you want to add cells.
Specify for Partition Manager to add one or more cells to the nPartition.
From Partition Manager Version 1.0, use the PartitionModify Partition action and select the Add/Remove Cells tab. To add cells to the nPartition, select the cells from the Available Cells list and click the Add button.
From Partition Manager Version 2.0, use the nPartitionModify nPartition action and select the Add/Remove Cells tab. To add cells to the nPartition, click on the checkbox for the new cells so that a checkmark appears.
After selecting the new cells to add to the nPartition, click the OK button.
Review all information presented in the Notes and Warnings, the Summary of Changes, and the HA Checks tabs and either cancel or proceed with the changes.
Click the Cancel button to cancel the changes.
To proceed with adding the cells, click the Finish button or click the OK button.
As needed, perform a reboot for reconfig on the modified nPartition (HP-UX: shutdown -R; Windows: shutdown /r; Linux: shutdown -r time; OpenVMS: @SYS$SYSTEM:SHUTDOWN with an automatic system reboot) .
See “Reboot for Reconfig Guidelines for Adding Cells” for details on when to perform a reboot for reconfig.

Assigning (Adding) Cells to an nPartition

Technical documentation

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